I'm trying to figure out how the #set velocity directive maps to a
jelly expression.
In Velocity, we're accustomed to using in our templates
Example 1
#set ($foo = 1)
${foo} (formal notation)
$foo
or
Example 2
${foo.size()} ## $foo is a vector placed into the context
Looking at the core taglibs, I tried Ex 1 using
<j:set var="foo" value="1"/>, <j:set var="foo" value="${1}"/> with no
luck.
Only
<j:set var="foo">1</j:set>
worked for me. Looking at the taglib doc, it says that the value attr
accepts an Expression. Is there any shorthand for this, other than
wrapping them in tags every single time? It's a pretty big difference
bet
#set ($foo = 1)
and
<j:set var="foo">1</j:set>
For Ex 2, I believe ${foo.size()} doesn't work coz it returns a
primitive. Is there any easy workaround?
For Ex 3, trying
<j:set var="foo" value="${bar.class}"/> or <j:set var="foo"
value="${bar.getClass()}"/> (aren't these Expressions?), and again
encapsulating the ${bar.class} within the <j:set> tags worked.
Just trying to make sure I understand how stuff is supposed to be
used.
Thanks!
Kelvin
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